Ar and Xe Velocities near the Presheath-Sheath Boundary in an Ar/Xe Discharge

作者：Gudmundsson, J T^*; Lieberman, M A

来源：Physical Review Letters, 2011, 107(4): 045002.

DOI：10.1103/PhysRevLett.107.045002

• Argon discharges
• Argon ion
• Particle in cell
• Presheath
• Velocity profiles
• Xenon ions

The velocities of Ar and Xe ions near the presheath-sheath boundary in an Ar/Xe discharge are studied by particle-in-cell Monte Carlo simulation. For a pure argon discharge the argon ion has almost the same velocity profile as it does in the mixture of argon and xenon. Similarly, for a xenon discharge the xenon ion has almost the same velocity profile as it does in the mixture of argon and xenon. The ion speed at the sheath-presheath boundary is the same for an ion in a pure argon or xenon discharge and for the same ion in a mixture of argon and xenon. We conclude that, in our simulation, each ion reaches its own Bohm speed at the presheath-sheath interface.

• 出版日期2011-7-18
• 单位上海交通大学